Recent content by essenmein

Odd that the last thing is only there when I hit reply, is that a hint? :wink: "Almost Plausible Solar Takeover Plan" is the name of the thread, and if "almost plausible" includes covering around 3% of the worlds third largest country in solar panels, then all good. The last thing I'll add...

What other reason is there then for pursuing solar and wind if the ultimate goal is not related to the e word, or c word? (ahem a different c word...) FYI, I'm no c change denier, or anti e, I'd actually rather we keep both in good shape. If this is just an academic exercise to see if solar...

Keep in mind, only about 3% of the total land area of the US is "developed"...

So I wonder if they also worked out the land area we'd have to destroy for this environmentally friendly endeavor? Topaz (https://en.wikipedia.org/wiki/Topaz_Solar_Farm) is 550MW peak. It covers an area of about 19km^2. If we use that as a reference, 19km^2 for 550MWpk, then to produce 8TW...

Perfect, thanks for this link! Some good reading in there. I don't know why, but stuff like this makes me smile! :D

Hmm interesting, so how do they handle that, low impedance on the gate holding it off? I think I'm going to keep investigating thyrsitors, when you do the math on the number of 25mOhm SiC die you need at max heatsink temp for bi directional 250Arms switch its eye wateringly expensive!

The dv/dt capability I was concerned about is the (I assume) off state critical dv/dt, but after reading more carefully the gate is open in this condition, they can probably handle larger dv/dt if gate is shorted. I can't go into to too much detail but it would be seeing inverter output voltage...

Funny you should mention MCT, i did my final year project with those, not sure if things changed since then but they were normally "ON" devices, which lead to some spectacular failures. :smile: I did a bit more reading on the SCR/Thyristor devices, GTO seems to be more higher voltage. I just...

I have very limited knowledge on these things, I can talk mosfet/igbt/SiC all day... lol Basically I need to make a bidirectional switch, 600-1200V rating, 2-600A capacity. No PWM or anything, just on and off, once on (or off), stay that way for at least seconds until next command. I was...

I'm by no means an embedded expert, but I'd never heard of this "bare metal programming" before... I/we've done plenty of work on everything from ATINY24 to Infineon Tricore, most smaller stuff generally doesn't have an RTOS, we just write C functions, sometimes in assembly if needed (esp with...

Heatpump HW heaters do have limitations, specifically the maximum hot side temperature is the problem, from memory its difficult for them to exceed 50-60C output temp without multi stage pumps, basically good for low grade heat at best. So they are perfect for areas that are warm already, but...

Not entirely sure how a rope would even "hold" a ball of plasma, its not particularly erm "solid". Let alone plasma that is in fact a raging ball of nuclear fire.

Not sure if this is too off topic, it is somewhat related, since the bulbous bow is all about reducing wave making to save energy. When it comes to displacement hulls, length plays a huge role, longer means faster before the waves you generate rob you of a lot of power: (source...

Another thing to keep in mind is that Li ion batteries are somewhat picky when it comes to overcharging. If you have little or no experience with this I would strongly recommend acquiring a purpose built 2 cell battery charger, lest you burn your house down or cause injury.

The bulbous bow is an interesting thing. The idea is to create destructive interference of waves, the bulb creates a trough where the bow meets the surface, thereby canceling the bow wave. So there is energy lost by creating the initial trough, but this is offset by the much lower wave...